Happiness measure, code: O-SLu-g-sq-n-11-a

Selfreport on single question:

How satisfied are you with your life in general? Indicate your satisfaction by giving a number between 0 and 10, where 0 means 'completely dissatisfied' and 10 'completely satisfied'. So, the more satisfied you are the higher the number.0 completely unsatisfied12345678910 completely satisfied